Provide scaler for Dynatrace metrics

[davidlm228]

Proposal

Provide k8s autoscaling based on Dynatrace Metrics

Scaler Source

Pods

Scaling Mechanics

https://www.dynatrace.com/support/help/dynatrace-api/environment-api/metric-v2/get-all-metrics

Authentication Source

https://www.dynatrace.com/support/help/dynatrace-api/basics/dynatrace-api-authentication

Anything else?

No response